Provenance System Analysis of the Nantun Formation of the Huhehu Sag in Hailar Basin   总被引：1，自引：0，他引：1  

LI Junhui  MENG Qi’an  LU Shuangfang  ZHU Defeng  WU Haibo  LIU He  ZHANG Dazhi 《《地质学报》英文版》2012,86(1):189-198

Huhehu Sag is a new battlefield for the future oil and gas exploration in the Hailar Basin. At present, exploration of this area stays at a low level and the understanding of the provenance system of the Nantun Formation is comparatively weak. So, to carry out the detailed depiction of the provenance system in the study area is significant for the sedimentary system reconstruction, for the prediction of reservoir distribution and favorable areas. Based on comprehensive analysis of paleogeomorphy, light-heavy mineral and seismic reflection features, sandstone thickness and sandstone percentage, this paper analyzes in detail the provenance system of the Nantun Formation in Huhehu Sag from various angles and levels. It shows that provenances of the Huhehu Sag mainly originated from the eastern Xilinbeier Salient and western Bayan Mountain Uplift. The provenances surrounding the lake basin converged to the center of the basin, among which, the steep slope belt and the gentle slope belt are the main provenances, and the southern uplift is a secondary one. The distribution framework of the provenance fundamentally determines the distribution rules of the depositional system and its sand body developing during the Nantun period.  相似文献   

青东凹陷古近纪构造演化与盆地转型   总被引：2，自引：0，他引：2  

王文君  李伟  冯德永  张明震  赵丽萍  贾海波  李成 《大地构造与成矿学》2012,36(1):32-38

通过对三维地震、钻井岩心及录测井资料的详细分析解释,发现青东凹陷古近纪不同演化阶段的构造特征存在着差异性:孔店期-沙四早期青东凹陷以NW向断层控盆为主,整体断层数量较少,但规模较大;沙四晚期断层数量明显增多,各个方向控盆断层均有发育,NW向的青东12断层消亡,主要以NWW和近EW向断层活动为主;沙三-沙二期控盆断层走向主要为NE和NEE向。这种构造格局的转变导致了相应的盆地转型,青东凹陷孔店期表现为受郯庐断裂带左旋走滑应力场控制之下的一系列北东断南西超的北西向半地堑,地层沉积厚度大;沙四期青东凹陷表现为NWW与近EW向兼有的复合盆地格局,为盆地转型阶段;沙三期、沙二期受郯庐断裂带右旋走滑应力场的影响,盆地格局完全转为近EW和NE(E)向,开始发育北断南超的半地堑和双断式堑垒构造。  相似文献   

小波分析在T梁结构损伤识别中的应用研究     

韩西  崔璟  钟厉  狄海波  杨科 《地震工程与工程振动》2011,31(1):101-105

为了提高结构损伤识别的精确度和适用性,将小波分析引入到结构损伤识别中.本文介绍了梁结构在完好状态与损伤状态下振动测试加速度差的理论分析,证明了小波分析加速度差应用于桥梁结构损伤检测的可行性.然后以小波分析为工具,在桥梁结构不同损伤状态下,以移动荷载作用下各节点的加速度时程曲线差为研究对象,来识别结构的损伤状态.并通过试...  相似文献   

不同频带数字化测震对比     

张娟  陈海博  张有林  曾宪军  汪继林  薛志明  陈俊  于林民 《地震地磁观测与研究》2011,32(1):39-47

通过对蒙城地震台不同频带数字化测震仪器记录的波形及震级进行对比分析,得出不同频带仪器记录不同地震事件的特点及其优越性,有利于提高数字化资料分析的精度.在进一步保证蒙城地震台观测资料的完整性和提高全频带数字化测震观测质量的同时,为蒙城地球物理野外观测研究站的科学研究提供有力数据支持.  相似文献   

安徽省地电阻率台址电性结构特征参数的初步分析     

王燚坤  隆爱军  张有林  曹晓星  陈远东  陈海博  陆立 《地震地磁观测与研究》2011,32(2):25-30

依据电测深资料,计算研究安徽省合肥、肥东、蒙城3个地电阻率台站的电性结构特征参数:干扰系数α、γ和异常系数β.讨论不同电性结构、不同极距、不同测线下特征参数的变化速率及相互之间的比例关系.研究结果表明,特征参数可以直观反映台址不同极距下的抑制干扰能力和映震能力,并对提升观测效能具有一定的指导意义.  相似文献   

Mechanical analysis for progressive failure of debris landslide     

Haibo Miao  Kunlong Yin  Deying Li 《山地科学学报》2011,8(2):328-335

It is of significance to research failure mechanism of debris landslides that are widespread in the Three Gorges Reservoir Area. Based on the statistical analysis of the developmental law and failure mode of debris landslides in the Three Gorges Reservoir, the mode of progressive failure is found. The mechanical model for progressive failure of debris landslides with two slip bands is also established by applying slice method. According to the results of the downslide force between adjacent slices, if the downslide force of lower slice is larger than zero, the slice fails along the major sliding surface, otherwise it is stable. In result, the failure range is obtained. The stress function can be determined through dimensional analysis of failure slice. According to static boundary conditions of the slice, stress state of any point in the slice can be obtained. Then stress state of any point in the secondary slip band can also be established. The failure of the secondary slip band is judged on the basis of Mohr-Coulomb failure criterion. Therefore, a mechanical method is proposed to analyze the progressive failure of debris landslide with two slip bands.  相似文献   

淮南市朱集东矿井新生界松散层地下水开采保证程度评价     

王海波  李磊 《中国煤炭地质》2011,(9):42-44,51

利用淮南市朱集东矿井新生界松散层供水水文地质勘探成果和抽水试验资料,查明了区内新生界松散层供水含水层的供水水文地质条件,认为第一含水层埋藏浅,易受污染,水量随季节变化大,不宜作为生活饮用水供水水源,第三含水层水质较差,亦不作为生活饮用水供水水源,确定了第二含水层为矿区主要供水层位。采用解析法对第二含水层的水量进行了计算,并设计了布井方案,计算了井群水量;水位预报结果表明,开采50a后,3#、4#井中的水位最大降深为35.229m,小于其顶板埋深,说明拟建井群布置是合适的。评价结果为矿井供水设计提供了依据。  相似文献   

Endogenous and exogenous lead in soils of Yangtze River Delta region,China: identified by lead isotopic compositions and multi-elemental approaches   总被引：1，自引：0，他引：1  

Haibo Zhang  Yongming Luo 《Environmental Earth Sciences》2011,62(5):1109-1115

Thirty typical soil profiles were sampled in Yangtze River Delta (YRD) region and analyzed for stable lead (Pb) isotopes and total concentrations of Pb and scandium (Sc). Pb isotopic compositions of A-horizon and C-horizon and Pb/Sc ratio were combined to estimate the amounts of endogenous and exogenous Pb accumulated in topsoil and identify possible sources. The results indicated that Pb exhibits a trend of accumulation in topsoil at regional scale. The isotopic composition of endogenous Pb is characterized by a narrow range of isotope ratios, varying with parent material, while that of exogenous Pb is characterized by a comparatively wide range of isotope ratios, varying with anthropogenic source. Coal combustion is probably the most important anthropogenic source of exogenous Pb in the soils of YRD region, as identified by isotopic ratio cross-plot combined with multi-elemental approaches.  相似文献   

The Indian Ocean’s asymmetric effect on the coupling of the Northwest Pacific SST and anticyclone anomalies during its spring–summer transition after El Niño     

Haibo?HuEmail author  Jie?He  Qigang?Wu  Yuan?Zhang 《Journal of Oceanography》2011,67(3):315-321

By comparing different climatologies in El Niño decaying summer with regard to the presence of Indian Ocean Basin (IOB) warming, we studied the effect of IOB warming on the Northwest Pacific sea surface temperature (SST) anomalies and the coupling process with the surface wind. Zonal asymmetric coupling feedback in the west and east of the Northwest Pacific were caused by the asymmetric spring–summer transition of the background tropical atmospheric circulation. Although the westward wind anomaly caused by the remote effect of IOB warming is found in the whole Northwest Pacific, reversal of the mean background surface winds in the western part leads to negative wind-evaporation SST (WES), whereas sustained trade winds lead to positive WES in the eastern part. The east–west SST gradient resulting from this zonal asymmetric evolution of SST sets off more positive feedback that strengthens the local anticyclone easterly anomalies.  相似文献   

Predicting size effect on diffusion-limited current density of oxygen reduction by copper wire     

«����  �캣��  ����  ���� 《中国海洋湖沼学报》2011,29(1):75-79

The size effect of copper wire radius (0.04–0.82 mm) on the diffusion-limited current density of an oxygen reduction reaction in stagnant simulated seawater (naturally aerated 0.5 mol/L NaCl) is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) and compared with the results obtained in 0.5 mol/L H2SO4. In the oxygen diffusion-limited range, size effect is found to occur independent of electrolytes, which is attributed to non-linear diffusion. Additionally, to satisfy application in a marine setting, an empirical equation correlating oxygen diffusion-limited current density to copper wire radius is proposed by fitting experimental data.  相似文献